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156 lines
4.0 KiB
156 lines
4.0 KiB
20 years ago
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/*
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** macints.h -- Macintosh Linux interrupt handling structs and prototypes
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**
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** Copyright 1997 by Michael Schmitz
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**
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** This file is subject to the terms and conditions of the GNU General Public
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** License. See the file COPYING in the main directory of this archive
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** for more details.
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**
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*/
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#ifndef _ASM_MACINTS_H_
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#define _ASM_MACINTS_H_
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#include <asm/irq.h>
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/* Setting this prints debugging info for unclaimed interrupts */
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#define DEBUG_SPURIOUS
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/* Setting this prints debugging info on each autovector interrupt */
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/* #define DEBUG_IRQS */
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/* Setting this prints debugging info on each Nubus interrupt */
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/* #define DEBUG_NUBUS_INT */
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/* Setting this prints debugging info on irqs as they enabled and disabled. */
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/* #define DEBUG_IRQUSE */
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/*
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* Base IRQ number for all Mac68K interrupt sources. Each source
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* has eight indexes (base -> base+7).
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*/
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#define VIA1_SOURCE_BASE 8
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#define VIA2_SOURCE_BASE 16
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#define MAC_SCC_SOURCE_BASE 24
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#define PSC3_SOURCE_BASE 24
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#define PSC4_SOURCE_BASE 32
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#define PSC5_SOURCE_BASE 40
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#define PSC6_SOURCE_BASE 48
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#define NUBUS_SOURCE_BASE 56
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#define BABOON_SOURCE_BASE 64
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/*
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* Maximum IRQ number is BABOON_SOURCE_BASE + 7,
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* giving us IRQs up through 71
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*/
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#define NUM_MAC_SOURCES 72
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/*
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* clean way to separate IRQ into its source and index
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*/
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#define IRQ_SRC(irq) (irq >> 3)
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#define IRQ_IDX(irq) (irq & 7)
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/* VIA1 interrupts */
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#define IRQ_VIA1_0 (8) /* one second int. */
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#define IRQ_VIA1_1 (9) /* VBlank int. */
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#define IRQ_MAC_VBL IRQ_VIA1_1
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#define IRQ_VIA1_2 (10) /* ADB SR shifts complete */
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#define IRQ_MAC_ADB IRQ_VIA1_2
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#define IRQ_MAC_ADB_SR IRQ_VIA1_2
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#define IRQ_VIA1_3 (11) /* ADB SR CB2 ?? */
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#define IRQ_MAC_ADB_SD IRQ_VIA1_3
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#define IRQ_VIA1_4 (12) /* ADB SR ext. clock pulse */
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#define IRQ_MAC_ADB_CL IRQ_VIA1_4
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#define IRQ_VIA1_5 (13)
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#define IRQ_MAC_TIMER_2 IRQ_VIA1_5
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#define IRQ_VIA1_6 (14)
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#define IRQ_MAC_TIMER_1 IRQ_VIA1_6
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#define IRQ_VIA1_7 (15)
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/* VIA2/RBV interrupts */
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#define IRQ_VIA2_0 (16)
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#define IRQ_MAC_SCSIDRQ IRQ_VIA2_0
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#define IRQ_VIA2_1 (17)
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#define IRQ_MAC_NUBUS IRQ_VIA2_1
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#define IRQ_VIA2_2 (18)
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#define IRQ_VIA2_3 (19)
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#define IRQ_MAC_SCSI IRQ_VIA2_3
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#define IRQ_VIA2_4 (20)
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#define IRQ_VIA2_5 (21)
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#define IRQ_VIA2_6 (22)
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#define IRQ_VIA2_7 (23)
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/* Level 3 (PSC, AV Macs only) interrupts */
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#define IRQ_PSC3_0 (24)
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#define IRQ_MAC_MACE IRQ_PSC3_0
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#define IRQ_PSC3_1 (25)
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#define IRQ_PSC3_2 (26)
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#define IRQ_PSC3_3 (27)
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/* Level 4 (SCC) interrupts */
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#define IRQ_SCC (32)
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#define IRQ_SCCA (33)
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#define IRQ_SCCB (34)
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#if 0 /* FIXME: are there multiple interrupt conditions on the SCC ?? */
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/* SCC interrupts */
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#define IRQ_SCCB_TX (32)
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#define IRQ_SCCB_STAT (33)
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#define IRQ_SCCB_RX (34)
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#define IRQ_SCCB_SPCOND (35)
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#define IRQ_SCCA_TX (36)
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#define IRQ_SCCA_STAT (37)
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#define IRQ_SCCA_RX (38)
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#define IRQ_SCCA_SPCOND (39)
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#endif
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/* Level 4 (PSC, AV Macs only) interrupts */
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#define IRQ_PSC4_0 (32)
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#define IRQ_PSC4_1 (33)
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#define IRQ_PSC4_2 (34)
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#define IRQ_PSC4_3 (35)
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#define IRQ_MAC_MACE_DMA IRQ_PSC4_3
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/* Level 5 (PSC, AV Macs only) interrupts */
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#define IRQ_PSC5_0 (40)
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#define IRQ_PSC5_1 (41)
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#define IRQ_PSC5_2 (42)
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#define IRQ_PSC5_3 (43)
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/* Level 6 (PSC, AV Macs only) interrupts */
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#define IRQ_PSC6_0 (48)
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#define IRQ_PSC6_1 (49)
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#define IRQ_PSC6_2 (50)
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#define IRQ_PSC6_3 (51)
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/* Nubus interrupts (cascaded to VIA2) */
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#define IRQ_NUBUS_9 (56)
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#define IRQ_NUBUS_A (57)
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#define IRQ_NUBUS_B (58)
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#define IRQ_NUBUS_C (59)
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#define IRQ_NUBUS_D (60)
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#define IRQ_NUBUS_E (61)
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#define IRQ_NUBUS_F (62)
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/* Baboon interrupts (cascaded to nubus slot $C) */
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#define IRQ_BABOON_0 (64)
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#define IRQ_BABOON_1 (65)
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#define IRQ_BABOON_2 (66)
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#define IRQ_BABOON_3 (67)
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#define SLOT2IRQ(x) (x + 47)
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#define IRQ2SLOT(x) (x - 47)
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#define INT_CLK 24576 /* CLK while int_clk =2.456MHz and divide = 100 */
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#define INT_TICKS 246 /* to make sched_time = 99.902... HZ */
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#endif /* asm/macints.h */
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